The images range from industrial interiors to landscapes under quite a range of lighting conditions, and are licensed for use in commercial work. Each file is available at 5,000 x 2,500 resolution

You’ll have to get in quick if you want to download the files: Wronkowski says that he plans to put the collection up for sale for €5 – although even then, as he notes, they will be “cheap like a beer”.

Updated 16 April 2014: Grzegorz Wronkowski contacted us to let us know about a new free HDRI. It’s a complete 8K sIBL pack of a country road with three hi-res backplates, licensed for commercial use.

If you haven’t done so recently, it’s also worth revisiting the Freebies section of the site, which has now grown to 67 separate files, and includes domestic interiors, skies, and a wide range of natural landscapes, under different lighting conditions and photographed at different times of day. It’s becoming an excellent resource.